Type-writer attachment.



E. P. C LOMAS.

TYPE WRITER ATTACHMENT.

APPIIICATION FILED OCT. 23, 1912'.

1 $8385 Patented June 11. 1918..

5 SHEETS-SHEET l- ATTORNEYS TYPE WRITER ATTACHMENT.

APPLICATION men OCT. 23. 1917.

Patented June 11. 1918.

5 SHEETS-SHEET 2- E. P. C. LOMAS.

TYPE WRITER ATTACHMENT.

APPLICATION FILED OCT. 23. 1911.

l ,fifi figo I Patented June 11. 1918.

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WIT/4E s... I INVEAITUR @922 m A 2 m. 6710MB "mama 5 i:. P. c. LOMA'S.

me WRITER ATTACHMENT.

APPLICATION FILED OCT. 23. 3917- w -b Rammed; 11111011. 1918.

E. P. C. LOMPi-S. TYPE WRITER ATTACHMENT.

APPLICATION FILED 067T. 23.-1917:

Patented June 1L 1918.

5 SHEETS SHEET 5,

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TYPE-WRITER arraorrntnnr."

messes.

Specification of Letters Patent. Patented June 111, 1918.

\ ,1 J Application filed. October 23, 1917. Serial No. 198,105.

T all whom it may concern;

Be lrnown that I, EARL P. C. LoM is, a citizen blt'the United States,and a res dent of Butte, in the county of SilverBow State of Montana,have invented certain new.

and useful Improvements in Type-Writer Attachments, of which thefollowing'is a specification.

My invention is an improvement n typeto writer attachments, and has forits object to provide mechanism in connectionwith the usual typewriterfor automatically return ing the carriage at the end of its movementdurin writing, wherein a spring motor is provic ed, wound and tensionedby the movement of the key barsfon their strikingmovd ment; andwhereinmeans is providedfo'r re straining the operation ofthe motoruntll .the end of the line is reached,"other mechanism bein provided,controlled by the move:

ment of t e carriage, for'releasing ,the re{ straining means, the saidrestraining ine/ans being connected to the key locking means 201releasin sition.

A further object of theiinvention 'is to provide trip mechanism operatedby the car riage at the end of its movement during the writing fortripping-the restrainingjmeans for the carriag returning mechanism.

A further object is to provide means'controlled by the usual carriagereleasing means for releasing the restraining means of the carriagereturning means whenever the carriage is released in the usualmanner;

'A further object is to provide -mecha-' nism controlled by the movementof the carriage for preventin -stoppage of the mo .40; tor andthecarriage by the-releasejof the key lockin In the drawings; Figure Lisarear. view of a typewriter provided with the. attachment; 7

Fig. 2 is an end View, with parts in'section and with parts removed;

9' means of the typewriter..

Fig; 3 is a detail of the-rehaseconnection;

Fig. at is a top plan viewof the typewriter; e i I Fig. 5 is aperspective, View of one of the of the carriage and a portion of theframe;

Fig. 7 is an end view of Fig. 6; l

5 A crank '6 is connected with the the restraining means when the 25 keylocking means is placed inoperative p0- typewriter.

6- is a partial plan view of one end .Fi 1'8 and 9 are perspectiveviewsot deta'i s of the mechanism for operating the" spacing mechanism-Fig. 10 is a deta1l perspective view of a portion of the spring motorand its controlling mechanism;

' Fig. 11 is a partial perspective view showingja portion of thecarriage; Fig. 12 is a section on the line 12-42 of Fig. 11; and

I i Fig. 13 is a section on the line l2, 12 of Fig. 12.

,The present embodiment of the invention is shown in connection with anUnderwood typewriter, indicated at 1, and the improved mechanismcomprises a. spring which is arranged within a cyllndrlcal casing 3, oneend of the sprlng being secured to the casing and the other to a shaft&which is journaled at the right end of the typewriter and at'the rearthereof, in the same manner as the usual spring 5 for running thecarriaggfio the left.

aft at the opposite end from the sprin ca ing, to perm1t the spring tobe woun and a ratchet wheel 7 is secured to the shaft, with which 7 forholdring 10, and move'the said ring rearwardly..

This ring bears against the angular ends of a pair of connected'bars 11,which are pivoted to the tops of levers 12 rigid with a shaft 13journaled in the typewriter casing at the rear thereof and form a partof the The motion of these bars 11 rearwardly is utilized to store uppower to return the carriage, that is, to wind the spring 2. Thisspring, which is the motor for returning the carriage, is wound to aten;

sion which exceeds the tension in the primary motor 5 few turns, so thatwhen the restraining means for preventin the operation of the spring 2is release the motor 2 will return the carriage.

The motor casino 3 is connected to the carriage by a band 14, the bandwinding upon the motor casing when the carriage is drawn to the right. Aratchet wheel 15 is rigid with the motor casing, and the teeth of thisratchet wheel are engaged by pawls 16 and 17, the said pawls being theactuating pawl and the holding pawl, respectively. The pawl 16 ispivoted toone of the arms of a bell crank lever 18, and the other arm ofthe lever is pivoted. to oneof the bars 11 in such manner that when thebar is moved rearwardly the pawl 16 willbe moveddownwardly. The pawl 17is pivoted between.

lugs 19 on the typewriter casing, and springs 20 are provided forpressing the pawls toward the ratchet wheel.

It will be evident from the description that every time a letter isstruck and the bars 11 move rearwardly, the motor 5 will be advanced adistance of one tooth, and

and each armhas an extension 24 passing just inside the adjacent pawland adapted to engage a cam 25 on the pawl to force the said pawlrearwardly to disengage it from the ratchet wheel. This yoke is swung torelease the pawls by means of the looking I bar 26 for the keys.

When the end of the line is reached, with the typewriter in question,this locking bar is swung forwardly intothe dotted line position of Fig.2, beneath catches or hooks 27 on the key levers, and the key levers areprevented from downward movement .by the locking bar. A link 28 connectsthe locking bar to the body of theyoke,that end of the link adjacent to,the locking bar being slotted, asshown at 29,.so-that the locking barmay have a limitedmovementwith respect to the link for a purpose tobepresently described. It will be evident that when the locking bar ismoved forwardly into the dotted line position of Fig. 2 the link will bemoved in the same direction and will swing the yoke to cause theextensions 24 to engage the cams 25 and release the pawls, and thespring 2 will immediately come into operation to; return the carriage.Means 1s provlded 1n connection wlth the usual release lever for thecarriage for releasing "the pawls 16 and 17 and themotor 2. The releaselever 30 is connected to the yoke by a link 31. This link has a notch 32at its upper end which engages a rod 33 forming a part of the releasemechanism,

and the opposite end of the link has an inclined slot or passage 34 inwhich the yoke body 21 engages. The upper end of the slot or passage isopen in order that it may be engaged with the yoke body, and. the linkis guided by headed pins 35 on the typewriter, which engagelongitudinally extending slots in the link. This slot or passage 3& isso.

inclined t when the rear end of the lever 30 is moved upwardly torelease the carriage the link 31 will be moved upwardly, and the bodyofthe yokewillbe pushed forwardly, thusswingingup the extensions 24: andreleasing the pawls. With this arrangement,-whenever the carriage isreleased at any point in its travel, the motor 2 will also be releasedto permit the typist to return the carriage. i i

When the carriage moves to the left and the end ofthe writing line isreached, the key locking mechanism, that is, the locking bar 26, ismoved forwardly to locking position. This is brought about bya lug 36 onthe carriage, which rides upon a species of caniplate 37 which isadjustably connected with a rack bar 38 on the typewriter frame.

A shaft 39 is then oscillated and this shaft" is connected with thelocking bar in such manner that the lockingbar will be moved forwardly.When, however, the carriage begins to return to the right, at once thelug 3.6 passes'off the cainplate 37,the locking bar is released, thatis, the said bar is swung rearwardly, and wereno means provided thepawls 16 and 17 would be permitted to engage the ratchet wheel15,checking the.

' leasedbythe movement of the carriage as it reaches the end off-itsmovement to the right, and precisely the same mechanism is prowided foroscillating the shaft 39 to release the locking; lever as that which isprovided to release the key lockingbar. The said} mechanism comprises acam plate 43 which;

isv adjustabl connected with the rack bar 38.

, This camp ate is a part of a slideal which is mounted to slide uponthe'shaft 39, and

v is locked to the rack bar at any desired point by means of a lever 45,the said lever having.

a toothed pawl 46 for engaging the rack bar to hold the slide at thepoint desired. By'this means the cam plate 43 may be placed whereverdesired at any point in the movement of the travel of the. carriage. Theshaft 39 has an arm 47, and this; arm hasan,angular portion whichengages the outer end of the lever 40 in such manner that when the shaft39 is oscillated by the downward movement of the rack bar 38 the angularportion will swing the lever to disengage i it 'fromth'e notch 42. Thelever 40 engages the notch by gravity, thepivotal connecincense tionbeing nearer that end of the lever engaged by the arm .47 than thatendwhichengages the link 28.

The operation of the above described mechanism is as follows: The partsbeing properly arranged and the spring 2 under proper tension, which maybe brought about by means of the crank 6, the typewriter is operatedin-the usual manner'to write. As the keys are operated the spring 2isplaoed' under tension, the wheel 15 advancing one tooth for every keystruck and for eaehmove ment of the'spacing' bar. As the carriage nearsthe end of its travel to the'left, the lug 36 will engage the cam plate37 and the locking bar 26 will be swung into locking position, carryingforward. the link 28, and swinging the yoke 21,-22 to release the pawls.The link 28 is locked in'its forward.

position, and, with the pawls released; by

means of the locking lever 40, the motor '2' nowmoves the carriageto theright, that is, returns it to commencing position, the lug 36 engagesthe cam plates?) and oscillates the shaft 39 to cause the arm 47 torelease the locking lever 40, thus permitting the link v to move forwardand the yoke to move into inoperative position. The springs 20-havesufficient resiliency to return the link and ,yoke to normal inoperativeposition. In

case it should be desired to return the carriage before reaching the'endof the line, or

-in case'it is desired to move the carriage in either direction, thatis, to releasevit for any purpose, it is released in the usual manner byswinging the lever 30 which is the release key for the carriage. When,this key is v swung the link 31 swings the yoke 21-22 to release thepawls. 40

The usual line spacing mechanism 48 is utilized the present case. Asleeve i9 is journaled on the carriage at 50, and this sllfeve has atone end a radial arm 51. At t e o gage the said line spacing mechanism48 to "to the. left. An elbow lever 53 is pivoted to 51 and theupstanding arm of the elbow operate the same when the arm 51 is'swung afixed portion of the typewriter, as indicated at 54, andvone of thearms'of the elbow lever normally rests upon a fixed portion 55 The otherarm of the elbow lever extends upwardly into. the path of movement ofthe arm 51, and when of the typewriter frame.

the carriage isjpassing to-the left the arm lever- 53 will move idlypast each other.-

When,however,' the carriage starts tomove.

toward the right, the arm 51, which has passed the upstanding arm of thelever, will engage behind the said upstanding arm and i I since thisupstanding arm of the elbow cannot swing in the opposite direction thelever arm 51 must swi as indicated in dotted lines'in Fig. 6, an the arm52 will operate posite endit has a tangential arm 52, I and tistangential arm is in position to en- 'of the keys at the end of a linethe line spacing mechanism of the typewriter.

The horizontal arm of the elbow lever 53 holds the parts in the positionshown in Fig. 7 by gravity. After the carriage begins its reversemovement to commencing position the line spacing mechanism will beoperated to advance the paper another line, and. Whether'thisadvancement is one space, two spaces or three spaces, it iscontrolled bythe Eli line'spacing mechanism in the usual manner,

The locking bar 26 is moved beneath the catches or hooks 27 by an arm 60depending move the locking bar 26 beneath the hooks for catches 27 Iclaim:

1. In combination with spring for returnin controlled by the striking-ofthe keys dura typewriter, a

ing writing for. placing the spring under tension, means for restraininthe operation of the spring, means for re easing the restraining meanscontrolled by it e locking of thekeys at the end of the line, andauxiliarylocking means for holdingthe restraining means ,in releasedposition when the keys are unlocked and. controlled to release thecarriage, means at the end'of the returnmovement of the Z carriage.

2. In combination with a typewriter, means for returning the carriage,meansdor restraining the operation of the returning means, and meanscontrolled by; the key locking means at the end of a line for releasintherestraining means. t

3. Iii combination wi'h atypew ter and the carriage release, means forreturning the carriage, means for restraining the 'op eration' of thereturning means, means con- 1 trolled by the key locking means at theend,

of a line for releasing therestraining means, and means controlled bythe carriage release for releasing the restraining race 5.

4, In combination with a ewriter, a

spring for returning the carriage, means controlled by the depression ofthe keys for plac- 2 a ingthe spring under tensiommeans for restrainingthe operation of the returning spring, and means controlled by thelooking for relefi ing the restraining means.

5. In combination with a ty ewriter and the carriage release, a springtor returning the carriage, means controlled bythe depression of thekeys for placing the spring .under tension, means for restraining theoperation of the returning spring, means con trolled by the locking ofthe keys at the end i of a line for releasing the restraining means,

' the carriage release, a spring movement of the keys and spacing barfor thereof, a common I the spring 'when the keys are locked at the yend of a line, a connection between the said 1 means and the release'key for the carriage for operating the said means to releasethe 7spring wiliary means for holding the said commonf' releasing means in 0'era'tivfe position after when the carriagefis released, aux

1 the keys are unloeke when the carriage begins to return, and meancontrolled by the carriage as it reaohes' the end of its movement towardcommencing position for releasnig the said auxlhary means.

7; n comblnatlon with a typewriter,

3 means for returning the carriage, means for operation of the returningrestraining the means; means controlled by the key locking means at theend of a line for releasing the restraining means, and means controlledby the movement of the carriage as it begins its return movementforvoperating the line spacing mechanism.

8 In combination wlt-h a typewriter, means for returmng the carriage,means for restraining the operation of the returning means, meanscontrolled by the key locking means at" the end of a line for releasingthe restraining means, means controlled by the carriage releaseforreleasing the restraming means, and means controlled by the move ment ofthe carria e as it commences its return movement or ioperating the linespacing mechanism.

EARL PERCIVAL UQURTENAY LOMAS.

